Folding Wheel and Portable Appliance

ABSTRACT

Disclosed are a folding wheel and a portable appliance. The folding wheel includes: a wheel body, wherein the wheel body include two wheel plates that can be spliced with each other, and a notched area is formed therebetween when the two wheel plates are spliced with each other; a first connecting element disposed in the notched area; a first slide rail mechanism, at least part of which is disposed on the first connecting element, and remaining parts of which are disposed on respective wheel plates, wherein the first slide rail mechanism includes a first rail groove and a first rotating shaft inserted into the first rail groove, such that the two wheel plates can be spliced with or separated from each other along the first rail groove via the first rotating shaft, and can be flipped relative to the first connecting element via the first rotating shaft; the folding wheel is foldable, wherein when the two wheel plates are pulled away from each other, the two wheel plates slide away from each other along the first rail groove. The two wheels may be flipped, wherein when the two wheel plates are folded towards each other, the portable appliance with reduced folded size facilitates the user to pack or carry.

FIELD OF THE INVENTION

Embodiments of the present disclosure relate to foldable portable appliances, and more particularly relate to a folding wheel and a portable appliance.

BACKGROUND OF THE INVENTION

Some wheeled portable appliances commonly used in conventional technologies, for example bicycles, kids' bikes, and strollers, as well as some kids' toys. are generally light-weight designed, even foldable, so as to be convenient to carry and pack.

However, for conventional portable appliances, their wheels usually occupy a relatively large space, causing it difficult to pack. Balance between working strength and folding friendliness is a factor that should be considered in designing a foldable appliance.

A wheel body is always a foundation of a portable appliance to bear stress and load; however, it is not easy to devise a pragmatical folding wheel. Folding wheels appropriate for portable appliances are hardly found in conventional technologies.

SUMMARY OF THE INVENTION

In view of the above, a folding wheel and a portable appliance are provided in an embodiment of the present application.

The folding wheel comprises:

a wheel body, including two wheel plates that can be spliced with each other, wherein a notched area is formed when the two wheel plates are spliced with each other;

a first connecting element arranged in the notched area;

a first slide rail mechanism, at least part of which is arranged on the first connecting element, and remaining parts of which are arranged on respective wheel plates, wherein the first slide rail mechanism includes a first rail groove and a first rotating shaft inserted into the first rail groove, the two wheel plates being configurable to be spliced with or separated from each other along the first rail groove via the first rotating shaft and configurable to be flipped by the first rotating shaft relative to the first connecting element via the first rotating shaft;

a securing mechanism configured to secure the two wheel plates to a mutually spliced state.

A portable appliance includes the folding wheel described above.

Compared with conventional technologies, the wheel body of the folding wheel may be locked to a spliced state by the securing mechanism, so as to be ready for use. To pack the portable appliance, a user folds the folding wheel by pulling the two wheel plates away from each other, wherein the first connecting element and the first left rotating shaft disposed thereon maintain immobile, while the two wheel plates slide away from each other along the first rail groove. When the two wheel plates are pulled away from each other, the first rotating shaft is still kept in the first rail groove; at this point, the user may flip the two wheel plates. When the two wheel plates are folded towards each other, the space occupied by the folded wheel body is smaller than the size of the wheel body. A portable appliance with a reduced fold size is easy to pack or carry.

BRIEF DESCRIPTION OF THE DRAWINGS

To elucidate the technical solutions of the present disclosure, the drawings used in describing the embodiments of the present disclosure will be briefly introduced below. It is apparent that the drawings as described relate to some embodiments of the present disclosure. To those skilled in the art, other associated structures not appearing in the drawings may also be derived based on these drawings without exercise of inventive work, wherein:

FIG. 1 is a structural schematic diagram of a wheel body of a folding wheel according to a first embodiment, wherein the wheel body is in a spliced state;

FIG. 2 is a structural schematic diagram of the wheel body of the folding wheel in the first embodiment, wherein the wheel body is in a separated state;

FIG. 3 is an exploded view of the wheel body of the folding wheel in the first embodiment, wherein the wheel body is being flipped;

FIG. 4 is a structural schematic diagram of the wheel body of the folding wheel in the first embodiment, wherein the wheel body is in a flipped state;

FIG. 5 is a structural schematic diagram of the wheel body of the folding wheel in the first embodiment, wherein the wheel body is flipped in another manner;

FIG. 6 is an exploded structural view of the folding wheel in the first embodiment;

FIG. 7 is another exploded structural view of the folding wheel in the first embodiment;

FIG. 8 is an exploded structural view of a folding wheel according to a second embodiment;

FIG. 9 is an exploded view of a plate body of the folding wheel in the second embodiment, wherein the plate body is flipped;

FIG. 10 is a structural schematic diagram of components of the plate body of the folding wheel in the second embodiment, wherein a third slide rail mechanism is illustrated;

FIG. 11 is a structural schematic diagram of components of the plate body of the folding wheel in the second embodiment, wherein a fourth slide rail mechanism is illustrated;

FIG. 12 is an exploded view of the folding wheel in the second embodiment, wherein the plate body is located at a second preset position;

FIG. 13 is a structural schematic diagram of the folding wheel in the second embodiment, wherein the folding wheel is spliced;

FIG. 14 is a structural view of the folding wheel in the second embodiment, wherein the folding wheel is folded and flipped;

FIG. 15 is an exploded view of the wheel body in the second embodiment;

FIG. 16 is a sectional view of the wheel body and the plate body before rotation in the second embodiment, which is for illustration and explanation purposes;

FIG. 17 is a sectional view of the wheel body and the plate body before rotation in the second embodiment;

FIG. 18 is a sectional view of a wheel body and a plate body before rotation according to a third embodiment;

FIG. 19 is an assembled schematic diagram of an insert and knob casings according to a fourth embodiment;

FIG. 20 is an exploded view of the plate body of the folding wheel in the fourth embodiment, wherein the plate body is at a first preset position;

FIG. 21 is an exploded view of the plate body of the folding wheel in the fourth embodiment, wherein the plate body is at the second preset position; and

FIG. 22 is a structural schematic diagram of the folding wheel in the fourth embodiment, wherein the folding wheel is being spliced.

DETAILED DESCRIPTION OF THE INVENTION WITH EMBODIMENTS First Embodiment

The present application is illustrated mainly with a foldable bike as an example. The inventive ideas and beneficial effects of the present application may also apply to other portable appliances, which will not be discussed in detail here.

Inventors of the present application found that in conventional technologies, to fold a foldable bike, the parts folded are mainly the handlebar and the crossbar, while the wheels cannot be folded; after the crossbar and handlebar are folded in place between two wheels, there is still unoccupied space between the two wheels, such that the space utilization is still low after the folding, and the space occupation is still large. The large space occupation of the folded bicycle is unfriendly to carry and store.

In view of the above problems, in a first embodiment of the present disclosure, there is provided a folding wheel, which is usually applicable to a portable folding appliance, particularly to a portable bicycle. As shown in FIGS. 1, 2, and 3, the folding wheel comprises:

a wheel body 1, including two wheel plates that can be spliced with each other, wherein a notch 21 is provided for each of the two wheel plates, and the two notches are spliced to form a notched area 2 when the two wheel plates are spliced with each other;

a first connecting element 4, which is connectable between the two wheel plates and disposed in the notched area 2;

a first slide rail mechanism, at least part of which is disposed on the first connecting element 4, and remaining parts of which are disposed on the two wheel plates, wherein the two wheel plates are capable of sliding along the first slide rail mechanism so as to be spliced with or separated from each other. For example, as shown in FIG. 3, the first slide rail mechanism may include: a first rail groove 31 and a first rotating shaft 32 inserted in the first rail groove 31;

a securing mechanism configurable to secure the two wheel plates to a mutually spliced state.

In conjunction with FIGS. 2 and 3, the two wheel plates may include a left wheel plate 11 and a right wheel plate 12; and the first rail groove 31 includes: a first left rail portion 311 provided on the left wheel plate 11, and a first right rail portion 312 provided on the right wheel plate 12. Two first rotating shaft 32 may also be provided: a first left rotating shaft 321 and a first right rotating shaft 322, respectively, wherein the first left rotating shaft 321 and the first right rotating shaft 322 are respectively disposed at two ends of the first connecting element 4 on the same side, and the direction in which the first left rotating shaft 321 and the first right rotating shaft 322 face each other is the direction in which the two wheel plates are spliced. The first left rail portion 311 and the first right rail portion 312 are both provided along the direction of splicing the two wheel plates, wherein the first left rotating shaft 321 may be slidably inserted into the first left rail portion 311; and the first right rotating shaft 322 may be slidably inserted into the first right rail portion 312.

It is additionally noted that as shown in FIGS. 1 and 2, when the wheel body 1 is at a spliced position, the first connecting element 4 is located in the notched area 2, such that the first connecting element 4 may be fitted with the wheel plates in the axial direction of the first rotating shaft 32, or an interstice may lie between the first connecting element 4 and the wheel plates. In cases that an interstice is existent between the first connecting element 4 and the wheel plates when the wheel body 1 is at the spliced position, as shown in FIG. 3, the first connecting element 4 and the wheel plates are connected only via the first rotating shaft 32; because the first rotating shaft 32 needs to transmit a force enabling synchronous rotation between the first connecting element 4 and the wheel body 1, it is highly demanding on rigidity of the first rotating shaft 32. Preferably, the first connecting element 4 in this embodiment is fully inserted into the notched area 2, and side edges of the first connecting element 4 are fitted with the wheel plates, respectively. The first rotating shaft 32 is disposed on one side edge of the first collecting element 4, and the first rail groove 31 is provided on walls of the wheel plates opposite to the first rotating shaft 32, thereby ensuring synchronous rotation between the wheel body 1 and the first connecting element 4.

It is seen that the left wheel plate 11 may slide along the first left rail portion 311 via the first left rotating shaft 321, the right wheel plate 12 may slide along the first right rail portion 312 via the first right rotating shaft 322; meanwhile, as the first left rotating shaft 321 and the first right rotating shaft 322 are both of an axial body, the left wheel plate 11 may flip relative to the first connecting element 4 about the first left rotating shaft 321 as an axial center, and the right rotating shaft may flip relative to the first connecting element 4 about the first right rotating shaft 322 as an axial center.

FIG. 1 illustrates a circumstance of folding the spliced wheel body 1, wherein because the two wheel plates are in a spliced state and the splicing faces of the two wheel plates fully abut against each other, neither of the wheel plates can be flipped relative to the first connecting element 4. In conjunction with FIGS. 2 and 3, a user first needs to grip the left wheel plate 11 and the right wheel plate 12 to pull them away from each other, wherein the first connecting element 4, and the first left rotating shaft 321 and the first right rotating shaft 322 on the first connecting element 4 maintain immobile, while the two wheel plates slide away from each other along the first left rail portion 311 and the first right rail portion 312 provided thereon, respectively. When the abutting faces of the two wheel plates are pulled apart from each other enough far, the first rotating shaft 32 is still located in the first rail groove 31, such that the user can flip the left wheel plate 11 and the right wheel plate 12. FIGS. 4 and 5 illustrate two flipped states of the wheel body 1. Apparently, as shown in FIG. 4, when the left wheel plate 11 and the right wheel plate 12 are folded towards each other, the folded wheel body 1 occupies a smaller space, which facilitates reduction of the fold size of the bicycle, thereby facilitating the user to pack or carry.

It is noted that to minimize the space occupied by the folded wheel body 1, the two wheel plates in this embodiment are provided to have a semi-circular shape with the same size, such that after the wheel body 1 is folded, the two wheels are symmetrical, avoiding occupation of more space due to additional projection in a single side direction. Of course, the two wheel plates may have fine differences in shape and size, which are not limited to the exemplary identical shape and size in this embodiment.

Additionally, because the two wheel plates have the same shape and size in this embodiment, the first connecting element 4 is disposed in the middle of the wheel body 1, such that the bicycle shaft runs through the central position of the first connecting element 4 to drive the wheel body 1 to rotate.

In addition, as shown in FIG. 4, after the two wheel plates are separated from each other and flipped relative to the first connecting element 3, the space in the notches 21 is still not utilized, which increases post-folding space occupation; in actual operations, after the two wheel plates are flipped relative to the first connecting element 4, the first connecting element 4 may be further configured to slide along the first rail groove 31 so as to snap the first connecting element 4 into the notches 21 of the wheel plates. Different from the circumstance of splicing the wheel plates, the first connecting element 4 is snapped into the notches 21 of the flipped wheel plates along the thickness direction; in this way, the space in the notches 21 becomes utilized, thereby further reducing the space occupied by the folded wheel body 1.

After the two wheel plates are spliced, a securing mechanism is used to lock the two wheel plates so as to avoid the potential risk caused by possible splitting of the wheel body 1 during riding The securing mechanism may be implemented in various manners, including clamping, screwing, etc. With screwing as an example, two semi-circular projections may be provided on the two wheel plates, respectively, wherein a threaded hole is provided on each semi-circular projection, the threaded holes being staggered in thickness direction of the wheel plates. When the two wheel plates are spliced, the threaded holes in the two semi-circular projections coincide in the thickness direction, such that the user may lock the two wheel plates by inserting a bolt through both of the threaded holes.

To guarantee securing firmness, in this embodiment, two locking portions are provided on each wheel plate, respectively, wherein the two locking portions are symmetrical relative to the axial center of the wheel body 1. Of course, the securing mechanism may also be provided in other manners than an exemplary clamping ring employed in this embodiment, which is not limited herein.

It is further noted that when folding the wheel body, the left wheel plate 11 rotates about the first left rotating shaft 321, and the right wheel plate 12 rotates about the first right rotating shaft 322; however, because the first left rotating shaft 321 and the first right rotating shaft 322 are disposed at the same side of the first connecting element 4, the folding wheel may further comprise a second slide rail mechanism so as to ensure flipping stability of the wheel body.

Specifically, as illustrated in FIG. 6, the second slide rail mechanism is at least partially disposed on the first connecting element 4. Corresponding to the first slide rail mechanism, the second slide rail mechanism may include a second rail groove 33 and a second rotating shaft 34 inserted into the second rail groove 33, wherein the second rotating shaft 34 and the first rotating shaft 32 are disposed at two opposite sides on the first connecting element 4, and the second rail groove 33 is also disposed opposite to the first rail groove 31.

The second rail groove 33 may include: a second left rail portion 331 provided on an inner wall of the notch 21 of the left wheel plate 11, and a second right rail portion 332 provided on an inner wall of the notch 21 of the right wheel plate 12. Two second rotating shaft 34 are formed: a second left rotating shaft 341 and a second right rotating shaft 342, respectively, such that the second left rotating shaft 341 may be slidably inserted into the second left rail portion 331 and the second right rotating shaft 342 may be slidably inserted into the second right rail portion 332.

It is noted that the second left rotating shaft 341 and the first left rotating shaft 321 may be coaxially arranged, and the second right rotating shaft 342 and the first right rotating shaft 322 may be coaxially arranged. With such arrangements, when the left wheel plate 11 is sliding, the first left rotating shaft 321 and the second left rotating shaft 341 slide synchronously so as to maintain balanced; and it is also the case for the right wheel plate 12, thereby avoiding sideslip of the wheel plates during sliding.

Meanwhile, when rotating, the left wheel plate 11 may rotate about the axial line common to the first left rotating shaft 321 and the second left rotating shaft 341. The first left rotating shaft 321 and the second left rotating shaft 341 guarantee rotating stability of the left wheel plate 11, so is the case for the right wheel plate 12.

In addition, as illustrated in FIGS. 6 and 7, the folding wheel has a first stop structure disposed on the first rail groove 31, and a second stop structure disposed in the second rail groove 33, wherein the first stop structure and the second stop structure are configured to limit a separation distance between the two wheel plates. As illustrated in FIG. 7, the first stop structure may include: a first left stop block 61 disposed in the first left rail portion 311 and a first right stop block 62 disposed in the first right rail portion 312. As illustrated in FIG. 6, the second stop structure may include: a second left stop block 63 disposed in the second left rail portion 331 and a second right stop block 64 disposed in the second right rail portion 332.

As illustrated in FIG. 7, when the two wheel plates are pulled away from each other, the first left rotating shaft 321 slides in the first left rail portion 311, and after sliding for a distance, the first left rotating shaft 321 abuts against the first left stop block 61; at this point, the position of the left wheel plate 11 is the extreme distance for pulling the left wheel plate 11. Likewise, the right wheel plate 12, after being pulled for a preset distance, also abuts with the first right stop block 62; and at this point, the position is also the extreme distance for pulling the right wheel plate 12. Arrangement of the first left stop block 61 and the first right stop block 62 may prevent disengagement of the first rotating shaft 32 from the first rail groove 31 caused by pulling the wheel plates for an excessive distance. It is also the case for the second stop structure.

To ensure sliding trajectory of the two wheel plates, as illustrated in FIGS. 6 and 7, the first connecting plate is provided with a first leading strip 71 disposed between the first left rotating shaft 321 and the first right rotating shaft 322 and a second leading strip 72 disposed between the second left rotating shaft 341 and the second right rotating shaft 342, wherein the first leading strip 71 and the second leading strip 72 may be both arranged in a strip shape, and their length directions are arranged along the direction of splicing the two wheel plates.

As illustrated in FIG. 7, when the left wheel plate 11 and the right wheel plate 12 are approaching to each other, the left end of the first leading strip 71 enters the first left rail portion 311, and the right end thereof enters the first right rail portion 312, so as to facilitate splicing of the two wheel plates and limit the splicing direction of the two wheel plates, thereby avoiding a circumstance that the two wheel plates cannot be smoothly spliced due to flipping along the first rotating shaft 32 during the mutual splicing process of the two wheel plates.

When the first stop structure is provided in the first rail groove 31, the length of the first leading strip 71 is limited, wherein when the two wheel plates are spliced, the distance between the first left stop block 61 and the first right stop block 62 is referred to as a first preset length. Apparently, to guarantee normal splicing of the two wheel plates, the length of the first leading strip 71 cannot be greater than the first preset length. In this embodiment, the length of the first leading strip 71 is equal to the first preset length, such that after the two wheel plates are spliced, two ends of the first leading strip 71 abut against the first left stop block 61 and the second right stop block 64, respectively, further improving stability of the spliced two wheel plates. In conjunction with FIG. 6, the second stop strip 72 has the same length as the first stop strip 71, leading the two wheel plates to be spliced via the second rail groove 33, thereby improving stability of the spliced two wheel plates.

Second Embodiment

The second embodiment of the present application is an improvement to the first embodiment. The main improvement lies in that in the second embodiment of the present application, as illustrated in FIGS. 8 and 9, a first fixation hole 13 is provided on each of the wheel plates, and a first split semi-hole 14 is provided on each wheel plate at the side spliced with the other wheel plate, such that when the two wheel plates are spliced, the two first split semi-holes 14 communicate with each other to form a first split hole 15.

As illustrated in FIGS. 9 and 10, the securing mechanism may include:

a plate body 9 including two fixation plates that can be spliced with each other, wherein the plate body 9 is configured for securing the wheel body 1, a second fixation hole 96 being provided on the plate body 9; a second split semi-hole 94 is provided for each fixation plate at the side facing the other fixation plate, such that when the two fixation plates are spliced with each other, the two second split semi-holes 94 are spliced to form a second split hole 95; a receiving space 93 is formed when the two fixation plates are spliced; wherein a second connecting element 8 is provided in the receiving space 93, configured for connecting the two fixation plates;

a third slide rail mechanism configured for guiding splicing of the plate body 9, wherein the third slide rail mechanism is at least partially disposed on the second connecting element 8, while remaining parts thereof are disposed on respective fixation plates; as illustrated in FIG. 10, the third slide rail mechanism may include a third rail groove 35 and a third rotating shaft 36 inserted into the third rail groove 35;

a pivoting axis, which passes through respective central portion of the first connecting element 4 and the second connecting element 8 so as to be connected to the wheel axle of the bicycle, wherein the first connecting element 4 is rotatable relative to the second connecting element 8 along the pivoting axis;

a fourth slide rail mechanism disposed opposite to the third slide rail mechanism; with reference to FIG. 11, the fourth slide rail mechanism may include a fourth rail groove 37 and a fourth rotating shaft 38 inserted into the fourth rail groove 37; and

an insert 10 shown in FIG. 12, wherein the insert 10 is configured to secure the plate body 9 and the wheel body 1.

As illustrated in FIGS. 10 and 11, the two fixation plates may refer to a left fixation plate 91 and a right fixation plate 92; the third rail groove 35 may include: a third left rail portion 351 disposed on the left fixation plate 91, and a third right rail portion 352 disposed on the right fixation plate 92; and the fourth rail groove 37 may include: a fourth left rail portion 371 provided on the left fixation plate 91, and a fourth right rail portion 372 provided on the right fixation plate 92.

Two third rotating shafts 36 may be formed: a third left rotating shaft 361 and a third right rotating shaft 362, respectively, wherein the third left rotating shaft 361 and the third right rotating shaft 362 are disposed at two ends of the third connecting element on the same side, respectively, and are arranged to face each other along the direction of splicing the two fixation plates. The third left rotating shaft 361 may be slidably inserted into the third left rail portion 3; and the third right rotating shaft 362 may be slidably inserted into the third right rail portion 352. Likewise, two fourth rotating shaft 38 may be provided: a fourth left rotating shaft 381 coaxial with the third left rotating shaft 361, and a fourth right rotating shaft 382 coaxial with the third right rotating shaft 362, respectively. Similar to the third rotating shaft 36, the fourth left rotating shaft 381 and the fourth right rotating shaft 382 may also be slidably inserted into the fourth left rail groove 371 and the fourth right rail groove 372, respectively. Meanwhile, the left fixation plate 91 may flip relative to the third connecting element about the respective axial center of the third left rotating shaft 361 and the fourth left rotating shaft 371, and the right fixation plate 92 may flip relative to the third connecting element about respective axial center of the third right rotating shaft 362 and the fourth left rotating shaft 371, such that the securing mechanism may always be positioned on the wheel plates so as to lock the spliced wheel plates.

It is noted that as illustrated in FIG. 12, the plate body 9 is fitted to the spliced wheel body 1 during the splicing process and is coaxially arranged with the wheel body 1, such that when the first connecting element 4 and the second connecting element 8 rotate relative to each other, the plate body 9 and the wheel body 1 also rotate relative to each other.

With reference to FIGS. 13 and 14, the position as shown is the first preset position where the plate body 9 rotates with the second connecting element 8, wherein the two fixation plates are in one-to-one correspondence with the two wheel plates and are respectively attached to the corresponding wheel plates, such that when the plate body 9 is located at the first preset position, the securing mechanism does not lock the wheel plates, and thus the fixation plates may be folded along with the wheel plates. In this embodiment, illustration is made with an example that the left wheel plate 11 corresponds to the left fixation plate 91 and the right wheel plate 12 corresponds to the right fixation plate 92. In an actual operation, the left wheel plate 11 may also correspond to the right fixation plate 92, and the right wheel plate 12 may also correspond to the left wheel plate 11. When folding the wheel plates and the fixation plates, the wheel plates move organically with the fixation plates attached thereto, such that when the user pulls the left wheel plate 11 and the right wheel plate 12 away from each other, the fixation plates attached on respective wheel plates move along with the respective wheel plates. Moreover, as the corresponding wheel plates are flipping, the fixation plates may flip relative to the second connecting element 8, thereby realizing synchronous flipping with the wheel plates.

To use the bicycle, the user needs to first splice the wheel plates and secure the wheel plates with the securing mechanism, and then rotates the plate body 9 with the second connecting element 8. With reference to FIG. 12, the position as shown is a second preset position where the spliced plate body 9 rotates with the second connecting element 8; at this point, with reference to FIG. 9, FIG. 10, and FIG. 12, the second split semi-holes 94 on the two fixation plates are spliced to form a second split hole 95 that coincides with the first fixation hole 13, wherein the first split semi-holes 14 are spliced to form a first split hole 15 that coincides with the second fixation hole 96. The insert 10 may pass through both of the first fixation hole 13 and the second split hole 95, as well as through the first split hole 15 and the second fixation hole 96, so as to secure the wheel body 1 and the plate body 9 to the spliced state, offering the user a safe riding.

To ensure securing firmness, as illustrated in FIG. 9, two first split hole 15, two second split hole 95, two first fixation hole 13, and two second fixation hole 96 are provided, wherein the two second fixation holes 96 and the two second split holes 95 are both symmetrical relative to the axial center of the plate body 9, and the two first fixation holes 13 and the two first split holes 15 are both symmetrical relative to the axial center of the wheel body 1; the dual insert-locking enhances locking firmness. It is additionally noted that the second preset position is not limited to the position illustrated in the figure; any position where the second split hole 95 coincidences with the first fixation hole 13 is referred to as the second preset position, which is irrelevant to the rotating angle of the plate body 9 with respect to the second connecting element 8. The figure is only an example, and in actual operations, the split line of the plate body 9 and the split line of the wheel body 1 may assume any angle.

As illustrated in FIGS. 10 and 11, a third stop structure may be provided in the third rail groove 35, and a fourth stop structure may be provided in the fourth rail groove 37. A third leading strip 73 may be provided between the third left rotating shaft 361 and the third right rotating shaft 362, and a fourth leading strip 74 may be provided between the fourth left rotating shaft 381 and the fourth right rotating shaft 382, wherein the third leading strip 73 and the fourth leading strip 74 are both arranged in a strip shape, and their length directions are arranged opposite to the left fixation plate 91 and the right fixation plate 92.

The third stop structure may include: a third left stop block 65 disposed in the third left rail portion 3, and a third right stop block 66 disposed in the third right rail portion 352. The fourth stop structure may include: a fourth left stop block 67 disposed in the fourth left rail portion 371, and a fourth right stop block 68 disposed in the fourth right rail portion 372.

Similar to the first stop structure, the third stop structure is arranged for avoiding disengagement of the third rotating shaft 36 from the third rail groove 35, and the fourth stop structure is arranged for avoiding disengagement of the fourth rotating shaft 38 from the fourth rail groove 37. Similar to the first leading strip 71, the third leading strip 73 and the fourth leading strip 74 are arranged to guide splicing of the two fixation plates and improve post-splicing stability.

To enhance stability of splicing the wheel body 1 and the plate body 9, when the two wheel plates are spliced, the first connecting element 4 and the two wheel plates are mutually clamped; and when the two fixation plates are spliced, the second connecting element 8 and the two fixation plates are mutually clamped.

FIG. 15 illustrate the notches 21 on the wheel plates, wherein a first clamping portion 16 is projected on a sidewall of one notch 21 facing the other notch 21, and a first clamping groove 42 is respectively provided at both sides of the first connecting element 4 in the direction of splicing the two wheel plates, such that when the two wheel plates are spliced, the first clamping portions 16 on the wheel plates are snapped into the first clamping grooves 42, thereby implementing clamping between the first connecting element 4 and the two wheel plates, which further improves stability of the spliced wheel plates. Likewise, as illustrated in FIG. 13, the fixation plates are also clamped with the second connecting plate 8 upon splicing. It is further noted that when the wheel plates and the fixation plates are rotating synchronously, the wheel plates are easily obstructed such that the flipping cannot proceed smoothly. In FIG. 16, the illustration is made with the left wheel plate 11 and the left fixation plate 91 as an example. Because the wheel plate and the fixation plate move synchronously, the first left rotating shaft 321 and the third left rotating shaft 361 are arranged opposite in the thickness direction of the first connecting element 4; however, when the left wheel plate 11 and the left fixation plate 91 are flipped synchronously, if the left fixation plate 91 rotates towards the direction of the first left rotating shaft 321, the first left rotating shaft 321 would obstruct rotation of the left fixation plate 91; if the left fixation plate 91 rotates towards a direction opposite to the first left rotating shaft 321, i.e., the left wheel plate 11 rotates towards the direction of the third left rotating shaft 361, then the third left rotating shaft 361 would obstruct rotation of the left wheel plate 11. Irrespective of to which directions the wheel plates and the fixation plates are rotated, they will be obstructed by the rotating shafts; it is also the case for the right wheel plate 12.

In view of the above, in this embodiment, as illustrated in FIG. 17, the first left rotating shaft 321 and the third left rotating shaft 351 are staggered in the thickness direction of the first connecting element 4, wherein the distance between the first left rotating shaft 321 and the first right rotating shaft 322 is smaller than the distance between the third left rotating shaft 351 and the third right rotating shaft 352, such that when the left fixation plate 91 rotates towards the direction of the first left rotating shaft 321, the first rotating shaft 321 does not obstruct the left fixation plate 91; and it is also the case for the right fixation plate 92, thereby guaranteeing smooth flipping of the fixation plates.

The securing mechanism in this embodiment offers advantages of secure fixation and easy operation; meanwhile, the fitting and fixation between the plate body 9 and the wheel body 1 may increase rigidity of the folding wheel in use, further enhancing stability of the folding wheel during riding.

Third Embodiment

The third embodiment of the present disclosure is substantially identical to the second embodiment. A main difference lies in that in the second embodiment, the first rotating shaft and the third rotating shaft are staggered, such that the fixation plates and the wheel plates can only be flipped towards the direction of the first rotating shaft; however, in this embodiment, as illustrated in FIG. 18, a first slideway 41 may be provided on the first connecting element 4 along the direction of splicing the two wheel plates, wherein the first slideway 41 is disposed on the first connecting element 4 at the side where the first left rotating shaft 321 and the first right rotating shaft 322 are disposed, and the first left rotating shaft 321 and the first right rotating shaft 322 are both disposed in the first slideway 41.

When the left fixation plate 91 rotates towards the direction of the first left rotating shaft 32, and the left rotating plate 11 rotates synchronously with the left fixation plate 91, the rotating left fixation plate 91 contacts with the first left rotating shaft 321, pushing the first left rotating shaft 321 to slide in the first slideway 41, such that the left fixation plate 91 may rotate smoothly, realizing synchronous flipping with the left rotating plate 11.

To use the folding wheel, it is needed to resume the folding wheel from the folded position to the original position, wherein the left wheel plate 11 needs to be flipped till being in flush with the first connecting element 4, and the left fixation plate 91 needs to be flipped till being in flush with the second connecting element 8; when the left fixation plate 91 and the left wheel plate 11 are flipping synchronously, the left wheel plate 11 pulls the first left rotating shaft 321 via a groove wall of the first left rail portion 311, and the first left rotating shaft 321 slides in the first slideway 41 till the position aligned with the third left rotating shaft 361, thereby guaranteeing that the left wheel plate 11 and the left fixation plate 91 may move synchronously in the splicing direction. Likewise, rotating of the right fixation plate 92 towards the first right rotating axis 322 also pushes the first right rotating shaft 322 to slide in the first slideway 41; when being flipped to the original position, the right wheel plate 12 pulls the first right rotating shaft 322 via a groove wall of the first right rail portion 312 to slide in the first slideway 41 till being aligned with the third right rotating shaft 362, thereby guaranteeing that the right wheel plate 12 and the right fixation plate 92 may move synchronously in the splicing direction.

It is noted that to enable the fixation plates and the wheel plates to flip towards any direction, a second slideway 81 may be provided on the second connecting element 8 along the direction in which the two fixation plates are spliced with each other, wherein the second slideway 81 is provided on the second connecting element 8 at the side where the third left rotating shaft 361 and the third right rotating shaft 362 are disposed.

When the left wheel plate 11 rotates towards the direction of the third left rotating shaft 361, and the left wheel plate 11 rotates synchronously with the left fixation plate 91, the rotating left wheel plate 11 contacts with the third left rotating shaft 361, pushing the third left rotating shaft 361 to slide in the second slideway 81, such that the left wheel plate 91 may rotate smoothly, realizing synchronous flipping with the left fixation plate 91.

With arrangement of the first slideway 41 and the second slideway 81, the folding wheel in this embodiment ensures a smooth rotation when the wheel plates and the fixation plates rotate synchronously, which avoids occurrence of jamming or flipping obstruction when folding the wheel body 1, thereby guaranteeing smooth folding and improving operation friendliness.

Fourth Embodiment

The fourth embodiment of the present application is further improvement of the second embodiment or the third embodiment. The main improvement lies in that the insert 10 is inserted into the second split hole 95 and the first fixation hole 13, but not in a conventional manner. Specifically, in the fourth embodiment of the present application, as illustrated in FIGS. 19 and 20, the insert 10 is provided in each of the first split holes 15 and each of the second split holes 95, wherein the insert 10 comprises:

a knob fastener 101, an insert head 102, a spring 103, a connecting element 104, a first knob casing 105, and a second knob casing 106;

wherein the insert head 102 is secured on the knob fastener 101 via the connecting element 104, and a spring 103 is disposed between the insert head 102 and the knob fastener 101;

the first knob casing 105 is secured on the first fixation hole 13, the second knob casing 106 is secured on the second split hole 95; and a hole with a shape matched with the insert head 102 is provided on each of the first knob casing 105 and the second knob casing 106;

the inset head 102 runs sequentially through the holes provided on the first knob casing 105 and the second knob casing 106 till being disposed at the side of the second knob casing 106 opposite to the first knob casing 105;

the knob fastener 101 is disposed at the side of the first knob casing 105 opposite to the second knob casing 106, and the spring 103 abuts against the first knob casing 105.

As the knob fastener 101 is rotating, the insert head 102 is brought to rotate, causing the insert head 102 to be misaligned from the holes. At this point, pushed by the spring 103 abutting against the first knob casing 105, the knob fastener 101 moves away from the first knob casing 105. However, because the connecting element 104 connects the knob casing 101 and the insert head 102, when the insert head 102 is misaligned from the holes, it is obstructed by the second knob casing 106, thereby simultaneously fastening the insert head 102 and the knob fastener 101.

The spring 103 not only serves to fasten, but also may provide enough friction so as to prevent the knob fastener 101 from rotating freely under a non-external force. As such, the insert 10 provided by the embodiments of the present application not only offers a good fastening effect, but also may implement quick installation and quick disassembly.

The connecting element 104 may be a screw or a linkage that implements connection via snap-fitting, or welding. The first knob casing 105 and the second knob casing 106 may be fixed using a fixing ring 107 or some other similar securing mechanisms.

Further optionally, a recess may be provided on the first knob casing 105, wherein the knob fastener 101 and the spring 103 are disposed at the side where the recess is provided. The recess arranged as such can better limit the spring 103, playing a protective role.

In practical use, as illustrated in FIG. 20, the plate body 9 is located at the first preset position; at this point, the knob fastener 101 may be rotated such that the insert head 102 is aligned with the holes provided on the first knob casing 105 and the second knob casing 106; in this way, after removing the knob fastener 101 and the insert head 102 which are connected via the connecting element 104, the wheel body 1 may be freely flipped, separated or spliced.

With reference to FIG. 21, the plate body 9 is disposed at the second preset position; at this point, rotating of the knob fastener 101 enables the insert head 102 to be misaligned from the holes provided on the first knob casing 105 and the second knob casing 106, thereby implement relevant fixation between the knob fastener 101 and the insert head 102; due to being obstructed by the plate body 9, the wheel body 1 can be better secured.

Fifth Embodiment

This embodiment relates to a portable appliance, including the folding wheel according to any one of the first to fourth embodiments. The portable appliance also achieves the same technical effect as any of the above embodiments.

Apparently, the folding wheel provided by the embodiments of the present application is not limited to be applied to bicycles. The portable appliance according to the present application may not only refer to a bicycle, but also may refer to a wheeled portable appliance such as a wheelchair, monocycle, or even kids' bikes, or even refer to various kinds of wheeled mobile toys. Any demand on portability and foldability may apply the folding wheel to achieve a reliable portable effect.

Those of normal skill in the art may understand that many technical details provided in the various embodiments above are only for readers to understand better. However, the technical solutions as claimed in the claims of the present application may be still implemented substantially even without these technical details or various changes and modifications of the embodiments above. Therefore, in actual applications, various alternations to the embodiments may be done in aspects of forms and details without departing from the spirit and scope of the present disclosure. 

What is claimed is:
 1. A folding wheel, comprising: a wheel body (1) including two wheel plates that can be spliced with each other, wherein a notched area (2) is formed therebetween when the two spliced wheel plates are spliced with each other; a first connecting element (4) disposed in the notched area (2); a first slide rail mechanism, at least part of which is arranged on the first connecting element (4), and remaining parts of which are arranged on respective wheel plates, wherein the first slide rail mechanism includes a first rail groove (31) and a first rotating shaft (32) inserted in the first rail groove (31), the two wheel plates being configurable to be spliced with or separated from each other along the first rail groove (31) via the first rotating shaft (32) and configurable to be flipped relative to the first connecting element (4) via the first rotating shaft (32); and a securing mechanism configurable to secure the two wheel plates to a mutually spliced state.
 2. The folding wheel according to claim 1, wherein a first stop structure is provided on the first rail groove (31), the first stop structure being configured to obstruct relative movement of the first rotating shaft (32).
 3. The folding wheel according to claim 2, wherein the two wheel plates include a left wheel plate (11) and a right wheel plate (12); the first rail groove (31) includes a first left rail portion (311) provided on the left wheel plate (11) and a first right rail portion (312) provided on the right wheel plate (12); two first rotating shaft (32) are formed: a first left rotating shaft (321) and a first right rotating shaft (322), respectively, wherein the first left rotating shaft (321) and the first right rotating shaft (322) are respectively disposed at two ends of the first connecting element (4) on the same side; the first left rotating shaft (321) is inserted into the first left rail portion (311), such that the left wheel plate (11) is movable along the first left rail portion (311); and the first right rotating shaft (322) is inserted into the first rail portion (312), such that the right wheel plate (12) is movable along the first right rail portion (312).
 4. The folding wheel according to claim 3, wherein a first leading strip (71) is provide between the first left rotating shaft (321) and the first right rotating shaft (322); and when the left wheel plate (11) and the right wheel plate (12) are approaching to each other along the first rail groove (31), the first leading strip (71) is inserted in the first rail groove (31) so as to facilitate guiding the two wheel plates to be spliced; and when the left wheel plate (11) and the right wheel plate (12) are moving away from each other along the first rail groove (31), the first leading strip (71) is disengaged from the first rail groove (31) such that the wheel plates are flipped with the first rotating shaft (32).
 5. The folding wheel according to claim 4, wherein the stop structure includes: a first left stop block (61) disposed in the first left rail portion (311), configured to obstruct relative movement of the first left rotating shaft (321); and a first right stop block (62) disposed in the first right rail portion (312), configured to obtain relative movement of the first right rotating shaft (322); wherein when the two wheel plates are spliced, two ends of the first leading strip (61) abut against the first left stop block (61) and the first right stop block (62), respectively.
 6. The folding wheel according to claim 1, wherein a notch (21) is formed on each of the two wheel plates, the respective notches (21) are configured to communicate to form the notched area (2) when the two wheel plates are spliced with each other, such that after the wheel plates are flipped relative to the first connecting element (4) via the first rotating shaft (32), the first connecting element (4) is snapped into the notches (21) of the wheel plates along the first rail groove (31) via the first rotating shaft (32); wherein the folding wheel further includes: a second slide rail mechanism, at least part of which is disposed on the first connecting element (4), and remaining parts of which are disposed on the respective wheel plates, wherein the second slide rail mechanism includes a second rail groove (33) and a second rotating shaft (34) inserted in the second rail groove (33), the second rail groove (33) is disposed opposite to the first rail groove (34), and the second rotating shaft (34) and the first rotating shaft (32) are coaxially arranged.
 7. The folding wheel according to any one of claims 1-6, wherein the securing mechanism includes: a plate body (9) including two fixation plates that can be spliced with each other, wherein a second split semi-hole (94) is provided for each fixation plate at the side spliced with the other fixation plate, such that when the two fixation plates are spliced with each other, a receiving space (93) is formed therebetween; and the two second split semi-holes (94) communicate with each other to form the second split hole (95); a second connecting element (8) disposed in the receiving space (93); a third slide rail mechanism, wherein the third slide rail mechanism is at least partially disposed on the second connecting element (8), while remaining parts thereof are disposed on respective fixation plates; the third slide rail mechanism includes a third rail groove (35) and a third rotating shaft (36) inserted into the third rail groove (35); and a pivoting axis, which passes through respective central portion of the first connecting element (4) and the second connecting element (8), such that the first connecting element (4) is rotatable relative to the second connecting element (8) along the pivoting axis; wherein a first fixation hole (13) is further provided on the wheel body (1); when the plate body rotates with the second connecting element (8) till a first preset position, with translational movement of the wheel plates, the two fixation plates can be spliced with or separated from each other along the third rail groove (35) via the third rotating shaft (36), and with flipping of the wheel plates, the two fixation plates can be flipped relative the second connection element (8) via the third rotating shaft (35); and the securing mechanism further includes an insert (10), wherein when the plate body rotates with the second connecting element (8) till a second preset position, the first fixation hole (13) is coincident with the second split hole (95) such that the insert (10) passes through the fixation hole (13) and the second spit hole (95) to secure both the wheel plates and the plate body to a spliced state.
 8. The folding wheel according to claim 7, wherein the first rotating shaft (32) is slidably provided on the first connecting element (4), wherein rotating of the fixation plates towards the first rotating shaft (32) along the third rotating shaft (36) pushes the first rotating shaft (32) to slide on the first connecting element (4); and the third rotating shaft (36) is slidably provided on the second connecting element (8), wherein rotating of the wheel plates towards the third rotating shaft (36) along the first rotating shaft (32) pushes the third rotating shaft (36) to slide on the second connecting element (8).
 9. The folding wheel according to claim 8, wherein a first split semi-hole (14) is provided on each of the wheel plates at the sides spliced with the other wheel plate, such that when the two wheel plates are spliced with each other, the two first split semi-holes (14) communicate with each other to form a first split hole (15); and a second fixation hole (96) is provided on the plate body, wherein when the plate body rotates with the second connecting element (8) till the second preset position, the insert (10) passes through the first split hole (15) and the second fixation hole (96) to fix the plate body to the wheel plates.
 10. The folding wheel according to claim 7, wherein two first split holes (15) and two first fixation hole (13) are provided, respectively, wherein a link line between the two first split holes (15) and a link line between the two first fixation holes (13) assume a preset angle with respect to each other; two second split holes (95) and two second fixation holes (96) are provided, respectively, wherein a link line between the two second split holes (95) and a link line between the two second fixation holes (96) assume a preset angle with respect to each other; and the plate body at the first preset position rotates with the second connecting element for a preset angle till reaching the second preset position.
 11. The folding wheel according to claim 7, wherein the insert (10) is provided in each of the first split holes (15) and each of the second split holes (95), the insert (10) comprising: a knob fastener (101), an insert head (102), a spring (103), a connecting element (104), a first knob casing (105), and a second knob casing (106); wherein the insert head (102) is secured on the knob fastener (101) via the connecting element (104), and a spring (103) is disposed between the insert head (102) and the knob fastener (101); the first knob casing (105) is secured on the first fixation hole (13), the second knob casing (106) is secured on the second split hole (95); and a hole with a shape matched with the insert head (102) is provided on each of the first knob casing (105) and the second knob casing (106); the inset head (102) runs sequentially through the holes provided on the first knob casing (105) and the second knob casing (106) till being disposed at the side of the second knob casing (106) opposite to the first knob casing (105); and the knob fastener (101) is disposed at the side of the first knob casing (105) opposite to the second knob casing (106), and the spring (103) abuts against the first knob casing (105).
 12. A portable appliance, comprising the folding wheel according to any one of claims 1 to
 11. 